Spectre/Game/GameTime: add shouldTick()

include/Spectre/Game/GameTime.h

@@ -18,10 +18,10 @@ public :
 
 	Time 	getElapsed() const;
 
-	//bool	shouldTick();
-
 	bool	beginFrame();
 
+	bool	shouldTick() const;
+
 	bool	tick();
 
 	void	reset();

source/Game/GameTime.cpp

@@ -32,12 +32,18 @@ bool GameTime::beginFrame()
 	accumulateTime();
 
 	// Signal if we should tick
+	return shouldTick();
+}
+
+bool GameTime::shouldTick() const
+{
+	// if acc is larger than one slice, we have atleast one tick.
 	return m_acc > m_slice;
 }
 
 bool GameTime::tick()
 {
-	if (m_acc > m_slice) {
+	if (shouldTick()) {
 		m_acc -= m_slice;
 		return true;
 	}